Profiling Linux Code with perf and Flamegraphs
A hands-on guide to sampling CPU call stacks with perf and rendering them into flamegraphs that clearly expose the real hot functions in your code.
Hardware & Performance8 min read
NetBay journal
Hardware & Performance
26 practical Hardware & Performance articles from Netbay Engineering — written for operators running Linux and Windows VPS in India.
26 articles in this topic
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Benchmarking a VPS Honestly: sysbench, iperf and Caveats
How to benchmark CPU, RAM, disk, and network on a VPS so the numbers are actually meaningful, and the common traps that make those numbers lie.
Hardware & Performance9 min read
Load Average and CPU Steal on Virtualized Hosts
Learn what load average and the Unix CPU steal column really mean on a shared VPS, and how to tell noisy neighbours from real, unavoidable demand.
Hardware & Performance6 min read
TRIM and Discard for Virtualized SSD Storage
How fstrim and the discard mount option keep a virtualized SSD from wearing out or reporting phantom usage, with the guest-side commands to verify.
Hardware & Performance5 min read
Profiling a Slow Server from First Principles, Top to Code
A repeatable drill that walks a slow VPS from the uptime command and top down to a hot function, so you fix the real bottleneck instead of chasing a symptom.
Hardware & Performance9 min read
Disk Quotas and Capacity Monitoring: VPS Basics
Per-user and per-filesystem disk quotas on Linux, plus a capacity monitoring loop with thresholds and alerting so no volume ever fills silently.
Hardware & Performance6 min read
TCP and Kernel Tuning for Latency-Sensitive Servers
Practical sysctl changes for high-traffic Linux servers, from socket buffers to queuing, that reduce latency without touching application code.
Hardware & Performance8 min read
Expanding LVM Logical Volumes Without Downtime
Grow a VPS volume group and an online ext4 or XFS logical volume with pvresize and lvextend -r, plus the caveats that make shrinking a different sport.
Hardware & Performance5 min read
Choosing the Right Instance Size for Your Application Workload
A practical method for sizing a VPS by measuring memory, CPU, and concurrent connections under real traffic, instead of guessing from the dashboard.
Hardware & Performance8 min read
RAID on a Single Server: Hardware vs Software Reality
What RAID really protects on a single node, why hardware RAID is mostly a platform-level rental, and when mdadm software RAID is worth it on a VPS.
Hardware & Performance6 min read
Server Filesystems Compared: ext4, XFS, btrfs, ZFS
An overview of ext4, XFS, btrfs, and ZFS for VPS workloads: maturity, snapshots, checksums, and where each filesystem clearly wins or costs you.
Hardware & Performance7 min read
RAM Planning: Spotting Memory Pressure Before the OOM Killer
Learn to read memory pressure on a VPS, distinguish reclaimable cache from real usage, and size your RAM well before the OOM killer ever acts.
Hardware & Performance7 min read